docs.sheetjs.com/docz/static/cli/snapshot.rs

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Rust
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2023-05-23 06:28:14 +00:00
/* run code, get result as a Rust String */
fn eval_code(scope: &mut v8::HandleScope, code: &str) -> std::string::String {
let source = v8::String::new(scope, &code).unwrap();
let script = v8::Script::compile(scope, source, None).unwrap();
let result = script.run(scope).unwrap();
return result.to_string(scope).unwrap().to_rust_string_lossy(scope);
}
fn main() {
create_snapshot();
}
fn create_snapshot() {
/* initialize */
let platform = v8::new_default_platform(0, false).make_shared();
v8::V8::initialize_platform(platform);
v8::V8::initialize();
let startup_data = {
let mut isolate = v8::Isolate::snapshot_creator(None);
{
let handle_scope = &mut v8::HandleScope::new(&mut isolate);
let context = v8::Context::new(handle_scope);
let context_scope = &mut v8::ContextScope::new(handle_scope, context);
/* load library */
{
let script = std::fs::read_to_string("./xlsx.full.min.js").expect("Error reading xlsx.full.min.js");
let _result = eval_code(context_scope, &script);
}
context_scope.set_default_context(context);
}
isolate.create_blob(v8::FunctionCodeHandling::Clear).unwrap()
};
let blob: Vec<u8> = startup_data.to_vec();
std::fs::write("snapshot.bin", blob).unwrap();
}